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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
138ff346 GU |
2 | #ifndef _M68K_PAGE_MM_H |
3 | #define _M68K_PAGE_MM_H | |
1da177e4 | 4 | |
1da177e4 LT |
5 | #ifndef __ASSEMBLY__ |
6 | ||
4f855897 | 7 | #include <linux/compiler.h> |
fbe9c961 RZ |
8 | #include <asm/module.h> |
9 | ||
1da177e4 LT |
10 | /* |
11 | * We don't need to check for alignment etc. | |
12 | */ | |
13 | #ifdef CPU_M68040_OR_M68060_ONLY | |
14 | static inline void copy_page(void *to, void *from) | |
15 | { | |
16 | unsigned long tmp; | |
17 | ||
18 | __asm__ __volatile__("1:\t" | |
19 | ".chip 68040\n\t" | |
20 | "move16 %1@+,%0@+\n\t" | |
21 | "move16 %1@+,%0@+\n\t" | |
22 | ".chip 68k\n\t" | |
23 | "dbra %2,1b\n\t" | |
24 | : "=a" (to), "=a" (from), "=d" (tmp) | |
25 | : "0" (to), "1" (from) , "2" (PAGE_SIZE / 32 - 1) | |
26 | ); | |
27 | } | |
28 | ||
29 | static inline void clear_page(void *page) | |
30 | { | |
31 | unsigned long tmp; | |
32 | unsigned long *sp = page; | |
33 | ||
34 | *sp++ = 0; | |
35 | *sp++ = 0; | |
36 | *sp++ = 0; | |
37 | *sp++ = 0; | |
38 | ||
39 | __asm__ __volatile__("1:\t" | |
40 | ".chip 68040\n\t" | |
41 | "move16 %2@+,%0@+\n\t" | |
42 | ".chip 68k\n\t" | |
43 | "subqw #8,%2\n\t" | |
44 | "subqw #8,%2\n\t" | |
45 | "dbra %1,1b\n\t" | |
46 | : "=a" (sp), "=d" (tmp) | |
47 | : "a" (page), "0" (sp), | |
48 | "1" ((PAGE_SIZE - 16) / 16 - 1)); | |
49 | } | |
50 | ||
51 | #else | |
52 | #define clear_page(page) memset((page), 0, PAGE_SIZE) | |
53 | #define copy_page(to,from) memcpy((to), (from), PAGE_SIZE) | |
54 | #endif | |
55 | ||
56 | #define clear_user_page(addr, vaddr, page) \ | |
57 | do { clear_page(addr); \ | |
58 | flush_dcache_page(page); \ | |
59 | } while (0) | |
60 | #define copy_user_page(to, from, vaddr, page) \ | |
61 | do { copy_page(to, from); \ | |
62 | flush_dcache_page(page); \ | |
63 | } while (0) | |
64 | ||
fbe9c961 RZ |
65 | extern unsigned long m68k_memoffset; |
66 | ||
1da177e4 LT |
67 | #ifndef CONFIG_SUN3 |
68 | ||
69 | #define WANT_PAGE_VIRTUAL | |
1da177e4 | 70 | |
fbe9c961 RZ |
71 | static inline unsigned long ___pa(void *vaddr) |
72 | { | |
73 | unsigned long paddr; | |
74 | asm ( | |
75 | "1: addl #0,%0\n" | |
76 | m68k_fixup(%c2, 1b+2) | |
77 | : "=r" (paddr) | |
78 | : "0" (vaddr), "i" (m68k_fixup_memoffset)); | |
79 | return paddr; | |
80 | } | |
22e58f9d | 81 | #define __pa(vaddr) ___pa((void *)(long)(vaddr)) |
fbe9c961 RZ |
82 | static inline void *__va(unsigned long paddr) |
83 | { | |
84 | void *vaddr; | |
85 | asm ( | |
86 | "1: subl #0,%0\n" | |
87 | m68k_fixup(%c2, 1b+2) | |
88 | : "=r" (vaddr) | |
89 | : "0" (paddr), "i" (m68k_fixup_memoffset)); | |
90 | return vaddr; | |
91 | } | |
92 | ||
1da177e4 LT |
93 | #else /* !CONFIG_SUN3 */ |
94 | /* This #define is a horrible hack to suppress lots of warnings. --m */ | |
40bb0c3e | 95 | #define __pa(x) ___pa((unsigned long)(x)) |
1da177e4 LT |
96 | static inline unsigned long ___pa(unsigned long x) |
97 | { | |
98 | if(x == 0) | |
99 | return 0; | |
100 | if(x >= PAGE_OFFSET) | |
101 | return (x-PAGE_OFFSET); | |
102 | else | |
103 | return (x+0x2000000); | |
104 | } | |
105 | ||
106 | static inline void *__va(unsigned long x) | |
107 | { | |
108 | if(x == 0) | |
109 | return (void *)0; | |
110 | ||
111 | if(x < 0x2000000) | |
112 | return (void *)(x+PAGE_OFFSET); | |
113 | else | |
114 | return (void *)(x-0x2000000); | |
115 | } | |
116 | #endif /* CONFIG_SUN3 */ | |
117 | ||
118 | /* | |
119 | * NOTE: virtual isn't really correct, actually it should be the offset into the | |
120 | * memory node, but we have no highmem, so that works for now. | |
121 | * TODO: implement (fast) pfn<->pgdat_idx conversion functions, this makes lots | |
122 | * of the shifts unnecessary. | |
123 | */ | |
124 | #define virt_to_pfn(kaddr) (__pa(kaddr) >> PAGE_SHIFT) | |
125 | #define pfn_to_virt(pfn) __va((pfn) << PAGE_SHIFT) | |
126 | ||
12d810c1 RZ |
127 | extern int m68k_virt_to_node_shift; |
128 | ||
6b2ad8d7 | 129 | #ifndef CONFIG_DISCONTIGMEM |
12d810c1 RZ |
130 | #define __virt_to_node(addr) (&pg_data_map[0]) |
131 | #else | |
132 | extern struct pglist_data *pg_data_table[]; | |
133 | ||
134 | static inline __attribute_const__ int __virt_to_node_shift(void) | |
135 | { | |
136 | int shift; | |
137 | ||
138 | asm ( | |
139 | "1: moveq #0,%0\n" | |
140 | m68k_fixup(%c1, 1b) | |
141 | : "=d" (shift) | |
142 | : "i" (m68k_fixup_vnode_shift)); | |
143 | return shift; | |
144 | } | |
145 | ||
146 | #define __virt_to_node(addr) (pg_data_table[(unsigned long)(addr) >> __virt_to_node_shift()]) | |
147 | #endif | |
1da177e4 | 148 | |
12d810c1 RZ |
149 | #define virt_to_page(addr) ({ \ |
150 | pfn_to_page(virt_to_pfn(addr)); \ | |
151 | }) | |
152 | #define page_to_virt(page) ({ \ | |
153 | pfn_to_virt(page_to_pfn(page)); \ | |
154 | }) | |
155 | ||
4bfc848e | 156 | #ifdef CONFIG_DISCONTIGMEM |
12d810c1 RZ |
157 | #define pfn_to_page(pfn) ({ \ |
158 | unsigned long __pfn = (pfn); \ | |
159 | struct pglist_data *pgdat; \ | |
160 | pgdat = __virt_to_node((unsigned long)pfn_to_virt(__pfn)); \ | |
161 | pgdat->node_mem_map + (__pfn - pgdat->node_start_pfn); \ | |
162 | }) | |
163 | #define page_to_pfn(_page) ({ \ | |
ba8f3184 | 164 | const struct page *__p = (_page); \ |
12d810c1 RZ |
165 | struct pglist_data *pgdat; \ |
166 | pgdat = &pg_data_map[page_to_nid(__p)]; \ | |
167 | ((__p) - pgdat->node_mem_map) + pgdat->node_start_pfn; \ | |
168 | }) | |
4bfc848e MR |
169 | #else |
170 | #define ARCH_PFN_OFFSET (m68k_memory[0].addr) | |
171 | #include <asm-generic/memory_model.h> | |
172 | #endif | |
1da177e4 LT |
173 | |
174 | #define virt_addr_valid(kaddr) ((void *)(kaddr) >= (void *)PAGE_OFFSET && (void *)(kaddr) < high_memory) | |
175 | #define pfn_valid(pfn) virt_addr_valid(pfn_to_virt(pfn)) | |
176 | ||
177 | #endif /* __ASSEMBLY__ */ | |
178 | ||
138ff346 | 179 | #endif /* _M68K_PAGE_MM_H */ |